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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: JReferenceField.html 842 2015-03-07 18:20:42Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.google.common.base.Converter;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import com.google.common.reflect.TypeToken;<a name="line.11"></a>
<span class="sourceLineNo">012</span><a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.lang.reflect.Method;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.util.TreeSet;<a name="line.14"></a>
<span class="sourceLineNo">015</span><a name="line.15"></a>
<span class="sourceLineNo">016</span>import org.jsimpledb.core.DeleteAction;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import org.jsimpledb.core.ObjId;<a name="line.17"></a>
<span class="sourceLineNo">018</span>import org.jsimpledb.core.ReferenceFieldType;<a name="line.18"></a>
<span class="sourceLineNo">019</span>import org.jsimpledb.schema.ReferenceSchemaField;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>/**<a name="line.21"></a>
<span class="sourceLineNo">022</span> * Represents a reference field in a {@link JClass} or a reference sub-field of a complex field in a {@link JClass}.<a name="line.22"></a>
<span class="sourceLineNo">023</span> */<a name="line.23"></a>
<span class="sourceLineNo">024</span>public class JReferenceField extends JSimpleField {<a name="line.24"></a>
<span class="sourceLineNo">025</span><a name="line.25"></a>
<span class="sourceLineNo">026</span>    final DeleteAction onDelete;<a name="line.26"></a>
<span class="sourceLineNo">027</span>    final boolean cascadeDelete;<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>    JReferenceField(JSimpleDB jdb, String name, int storageId, String description, TypeToken&lt;?&gt; typeToken,<a name="line.29"></a>
<span class="sourceLineNo">030</span>      org.jsimpledb.annotation.JField annotation, Method getter, Method setter) {<a name="line.30"></a>
<span class="sourceLineNo">031</span>        super(jdb, name, storageId, typeToken, new ReferenceFieldType(), true, annotation, description, getter, setter);<a name="line.31"></a>
<span class="sourceLineNo">032</span>        this.onDelete = annotation.onDelete();<a name="line.32"></a>
<span class="sourceLineNo">033</span>        this.cascadeDelete = annotation.cascadeDelete();<a name="line.33"></a>
<span class="sourceLineNo">034</span>    }<a name="line.34"></a>
<span class="sourceLineNo">035</span><a name="line.35"></a>
<span class="sourceLineNo">036</span>    @Override<a name="line.36"></a>
<span class="sourceLineNo">037</span>    public JObject getValue(JObject jobj) {<a name="line.37"></a>
<span class="sourceLineNo">038</span>        return (JObject)super.getValue(jobj);<a name="line.38"></a>
<span class="sourceLineNo">039</span>    }<a name="line.39"></a>
<span class="sourceLineNo">040</span><a name="line.40"></a>
<span class="sourceLineNo">041</span>    @Override<a name="line.41"></a>
<span class="sourceLineNo">042</span>    public &lt;R&gt; R visit(JFieldSwitch&lt;R&gt; target) {<a name="line.42"></a>
<span class="sourceLineNo">043</span>        return target.caseJReferenceField(this);<a name="line.43"></a>
<span class="sourceLineNo">044</span>    }<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>    @Override<a name="line.46"></a>
<span class="sourceLineNo">047</span>    public Converter&lt;ObjId, JObject&gt; getConverter(JTransaction jtx) {<a name="line.47"></a>
<span class="sourceLineNo">048</span>        return new ReferenceConverter&lt;JObject&gt;(jtx, JObject.class).reverse();<a name="line.48"></a>
<span class="sourceLineNo">049</span>    }<a name="line.49"></a>
<span class="sourceLineNo">050</span><a name="line.50"></a>
<span class="sourceLineNo">051</span>    /**<a name="line.51"></a>
<span class="sourceLineNo">052</span>     * Get the {@link DeleteAction} configured for this field.<a name="line.52"></a>
<span class="sourceLineNo">053</span>     *<a name="line.53"></a>
<span class="sourceLineNo">054</span>     * @return this field's {@link DeleteAction}<a name="line.54"></a>
<span class="sourceLineNo">055</span>     */<a name="line.55"></a>
<span class="sourceLineNo">056</span>    public DeleteAction getOnDelete() {<a name="line.56"></a>
<span class="sourceLineNo">057</span>        return this.onDelete;<a name="line.57"></a>
<span class="sourceLineNo">058</span>    }<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span>    /**<a name="line.60"></a>
<span class="sourceLineNo">061</span>     * Determine whether the referred-to object should be deleted when an object containing this field is deleted.<a name="line.61"></a>
<span class="sourceLineNo">062</span>     *<a name="line.62"></a>
<span class="sourceLineNo">063</span>     * @return this field's delete cascade setting<a name="line.63"></a>
<span class="sourceLineNo">064</span>     */<a name="line.64"></a>
<span class="sourceLineNo">065</span>    public boolean isCascadeDelete() {<a name="line.65"></a>
<span class="sourceLineNo">066</span>        return this.cascadeDelete;<a name="line.66"></a>
<span class="sourceLineNo">067</span>    }<a name="line.67"></a>
<span class="sourceLineNo">068</span><a name="line.68"></a>
<span class="sourceLineNo">069</span>    @Override<a name="line.69"></a>
<span class="sourceLineNo">070</span>    ReferenceSchemaField toSchemaItem(JSimpleDB jdb) {<a name="line.70"></a>
<span class="sourceLineNo">071</span>        final ReferenceSchemaField schemaField = new ReferenceSchemaField();<a name="line.71"></a>
<span class="sourceLineNo">072</span>        super.initialize(jdb, schemaField);<a name="line.72"></a>
<span class="sourceLineNo">073</span>        schemaField.setOnDelete(this.onDelete);<a name="line.73"></a>
<span class="sourceLineNo">074</span>        schemaField.setCascadeDelete(this.cascadeDelete);<a name="line.74"></a>
<span class="sourceLineNo">075</span>        final TreeSet&lt;Integer&gt; objectTypes = new TreeSet&lt;&gt;();<a name="line.75"></a>
<span class="sourceLineNo">076</span>        for (JClass&lt;?&gt; jclass : jdb.getJClasses(this.typeToken.getRawType()))<a name="line.76"></a>
<span class="sourceLineNo">077</span>            objectTypes.add(jclass.storageId);<a name="line.77"></a>
<span class="sourceLineNo">078</span>        schemaField.setObjectTypes(objectTypes);<a name="line.78"></a>
<span class="sourceLineNo">079</span>        return schemaField;<a name="line.79"></a>
<span class="sourceLineNo">080</span>    }<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span>    @Override<a name="line.82"></a>
<span class="sourceLineNo">083</span>    JReferenceFieldInfo toJFieldInfo(int parentStorageId) {<a name="line.83"></a>
<span class="sourceLineNo">084</span>        return new JReferenceFieldInfo(this, parentStorageId);<a name="line.84"></a>
<span class="sourceLineNo">085</span>    }<a name="line.85"></a>
<span class="sourceLineNo">086</span>}<a name="line.86"></a>
<span class="sourceLineNo">087</span><a name="line.87"></a>




























































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